SEL-MDX2

Transport Stream Multiplexer/Demultiplexer

Selenio™ MCP3

Electrical to Electrical (EES)

Electrical to RJ-45 (ERS)

The Selenio SEL-MDX2 encapsulator and multiplexer module makes it easy to multiplex, demultiplex, remultiplex or encapsulate streams for transport. Incoming programs can be readily repurposed into new programs, local content (commercials, news and more) can be easily added to existing programs, and new transport streams can be quickly generated.

The unique internal connectivity in the Selenio platform provides unprecedented flexibility. Content can be easily routed from a variety of sources, including MPEG-2 and H.264 encoder modules, various internal network interfaces such as DVB-ASI, and incoming transport streams from Gigabit Ethernet.

With features including DVB scrambling and conditional access (CA) enabled by a Simulcrypt interface, the Selenio multiplexer is ideal for contribution and distribution functions, as well as Direct-to-Home (DTH) market applications.

The Selenio SEL-MDX2 multiplexer is capable of accepting unencrypted programs from a variety of sources — from local encoders to network interfaces, including ASI or Gigabit Ethernet. It includes a Simulcrypt synchronizer to request information from a conditional access system over a dedicated Ethernet connection. Each program is encrypted using DVB common scrambling, and Entitlement Control Messages (ECM) are multiplexed into each stream to provide a DVB-compliant output.

The encryption engine supports 50 user-accessible simultaneous programs at a combined rate of up to 214 Mb/s. When not using encryption, the multiplexer supports up to an 800 Mb/s throughput.

External connections can include up to eight software-selectable independent inputs or outputs that can handle either DVB-ASI for input and output or the SMPTE 310M output protocols.

DVB-T2 Gateway Functionality
The Selenio SEL-MDX2 multiplexer can be upgraded to serve as a DVB-T2 Gateway. The Imagine T2 Gateway is an integral part of the company’s overall DVB-T2 broadcasting solution. The DVB-T2 Gateway encapsulates DVB/MPEG-TS into Physical Layer Pipes (PLP), authors in-band channel signaling, and orchestrates DVB-T2 transmitters with both Single Frequency Networking (SFN) time synchronization and transmitter control.

The Imagine T2 Gateway is integrated with the service multiplexors on a single module providing up to 8 PLPs.

In-band control and signaling is automatically authored based on validated modulation parameters entered through the intuitive web-based GUI.

SFN network synchronization is achieved by highly accurate and deterministic timestamps which can be generated by the gateway’s internal GPS receiver. All of this is then encapsulated into a T2-MI MPEG-TS stream for distribution to DVB-T2 modulators such as the Imagine Maxiva products.

DVB-T2 offers many advantages over a traditional DVB-T broadcasting solution in terms of both channel robustness of the waveform and overall user throughput. Effective user throughput is a function of implementation choices in the gateway, and not all gateways are engineered to be equal. Imagine has designed our T2 Gateway to help maximize user throughput.

Back Module Connectivity
The SEL-MDX1 mux/demux application module offers two choices for back module external connectivity - one with HD-BNC electrical connections for eight input or output ASI signals and one with HD-BNC electrical connections for five input or output ASI signals, and RJ-45 100Base-T connectivity to support conditional access.

SDI and ASI interfaces utilize a Belden-type 1505A, 1694A or 1695A cable with HD-BNC connectors. A cable removal tool is provided for these types of HD-BNC connections.